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<table width="100%" summary="page for OFP"><tr><td>OFP</td><td align="right">R Documentation</td></tr></table>

<h2>Visits to Physician Office </h2>

<h3>Description</h3>


<p>a cross-section
</p>
<p><EM>number of observations</EM> :  4406
</p>
<p><EM>observation</EM> :  individuals
</p>
<p><EM>country</EM> :  United States
</p>


<h3>Usage</h3>

<pre>data(OFP)</pre>


<h3>Format</h3>

<p>A dataframe containing :
</p>

<dl>
<dt>ofp</dt><dd><p>number of physician office visits</p>
</dd>
<dt>ofnp</dt><dd><p>number of nonphysician office visits</p>
</dd>
<dt>opp</dt><dd><p>number of physician outpatient visits</p>
</dd>
<dt>opnp</dt><dd><p>number of nonphysician outpatient visits</p>
</dd>
<dt>emr</dt><dd><p>number of emergency room visits</p>
</dd>
<dt>hosp</dt><dd><p>number of hospitalizations</p>
</dd>
<dt>numchron</dt><dd><p>number of chronic conditions</p>
</dd>
<dt>adldiff</dt><dd><p>the person has a condition that limits activities of daily living ?</p>
</dd>
<dt>age</dt><dd><p>age in years (divided by 10)</p>
</dd>
<dt>black</dt><dd><p>is the person african&ndash;american ?</p>
</dd>
<dt>sex</dt><dd><p>is the person male ?</p>
</dd>
<dt>maried</dt><dd><p>is the person maried ?</p>
</dd>
<dt>school</dt><dd><p>number of years of education</p>
</dd>
<dt>faminc</dt><dd><p>family income in 10000\$</p>
</dd>
<dt>employed</dt><dd><p>is the person employed ?</p>
</dd>
<dt>privins</dt><dd><p>is the person covered by private health insurance ?</p>
</dd>
<dt>medicaid</dt><dd><p>is the person covered by medicaid ?</p>
</dd>
<dt>region</dt><dd><p>the region (noreast, midwest,west)</p>
</dd>
<dt>hlth</dt><dd><p>self-perceived health (excellent, poor, other)</p>
</dd>
</dl>



<h3>Source</h3>


<p>Deb, P.  and  P.K.  Trivedi (1997) &ldquo;Demand for Medical Care by the Elderly: A Finite Mixture Approach&rdquo;, <EM>Journal of Applied Econometrics</EM>, <B>12</B>, 313-326..
</p>


<h3>References</h3>


<p>Cameron, A.C.  and   Trivedi P.K. (1998) <EM>Regression analysis of count data</EM>, Cambridge University Press, <a href="http://cameron.econ.ucdavis.edu/racd/racddata.html">http://cameron.econ.ucdavis.edu/racd/racddata.html</a>, chapter 6.
</p>
<p>Journal of Applied Econometrics data archive : <a href="http://jae.wiley.com/jae/">http://jae.wiley.com/jae/</a>.
</p>


<h3>See Also</h3>

<p><code>Index.Source</code>, <code>Index.Economics</code>, <code>Index.Econometrics</code>, <code>Index.Observations</code></p>


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